Electron Paramagnetic Resonance (EPR) experiments have been carried out on congruent crystals of LiNbO3 heavily doped with Mg or Zn and co-doped with Er. In addition to the EPR spectrum previously observed in crystals of LiNbO3:Er3+ an erbium spectrum not reported before is detected in samples... (Read more)

We report an ESR investigation of a center in MgO, CaO and SrO consisting of an O− ion neighbored by a substitutional Li+ ion. The center is identified by comparison with the isomorphous centers in ZnO and BeO and with the analogous V1, VOH and VF centers in the alkaline earth oxides. The... (Read more)